Jack.



LE ROY WILLOUR.

JACK.

APPLICATION FILED JAN. 6, 1913.

1 $53 589- Patented Sept. 14, 1915.

2 SHEETS-SHEET l.

LE ROY WILLOUR.

JACK.

APPLICATION FILED JAN. 6. 1913.

Patented Sept. 1-1, 1915.

2 SHEETS-SHEET 2.

wbtvw e Gum;

LE ROY WILLOUR, OF ASHLAND, OHIO, ASSIGNOR TO THE ASHLAND MANUFACTURING COMPANY, OF ASHLAND, OHIO, A CORPORATION OF OHIO.

JACK.

To all whom it may concern:

Be it known that I, Ln RoY WILLOU'R, a citizen of the United States, residing at Ashland, in the county of Ashland and State of Ohio, have invented certain new and useful Improvements in Jacks, of which the following is a specification.

My invention relates to lifting jacks and "has particular reference to a device of this "character having a lift element which is taneously drop the rack. bar or lift element either when the same is supporting the load or when there is no load upon it A further object of my invention is to provide a novel arrangement of the differentoperating elements of the jack, for producing a compact structure which is economical in space. v

A further object of the invention is to provide a jack of the above mentioned character, having novel means whereby the lift element may be automatically instantaneously dropped as soon as the load is taken ofl. of the lift element and the operating lever moved in one direction.

A further object of my invention is to pro vide jacks of the above mentioned character which are simple in construction, cheap to manufacture, strong and durable.

Other objects and advantages of this invention will be apparent during the,course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure 1 is an enlarged side view of the upper portion of the jack, the protecting plate or shield being removed, and the operating elements shown as raising the lift element, Fig. 2 is a central vertical sectional view taken throughmthe upper portion of the jack, some ofthe elements being shown in elevation for the purpose of illustration, Fig. 3 is a vlew similar to Fig. 2 but showing the operating elements I as lowering the lift element, Fig. 4 is an edge view of the upper portion of the jack taken at a right angle to Fig. 4.

In the drawings wherein for the purpose of illustration, I have shown a preferred Specification of Letters Patent. Patgnted S pt 14% 1915 Application filed January 6, 1913.

Serial No. 740,508.

embodiment of my invention, the numeral 8 designates an upstandin hollow standard secured to a base (not shown) and receiving there n a vertically movable lift element or bar 9. At its upper end this life element 9 is provided with a head 10, as shown. The lift element or bar 9 is provided upon one longitudinal edge thereof with ratchet teeth 11, to be engaged by holding and operating pawls 12 and 13, as shown.

The numeral 14 designates a housing which is cast upon the ppper end of the standard 8, as shown, and has a recess or chamber 15, for receiving the pawls 12 and 13. The pawl 12 is pivotally mounted upon a transverse pin 16, provided at one end with an enlarged head, and passes through the side walls of the housing 14, as shown. The operating pawl 13 is pivotallv mounted upon a pin 17, to be referred to. The holdlng pawl 12 is provided near its upper end with a laterally extending trunnion or pin 18, which is engaged by a spring 19, which serves to urge the holding pawl 12 into engagement with the ratchet teeth '11. The lower end of the operating pawl 13 is reduced and is inserted within the forked end 18 of a socket-lever 19. The pin 17 passes through the reduced end of the pawl 13 and pivotally connects the same with the inner end of the socket-lever 19, it being understood that the pin 17 has no connection with the side walls of the housing 14. The socket-lever 19 is disposed within the housing 14 and is supported by a transverse pin 20, disposed outwardly and to one side of the pin 17, the pin 20 serving as a pivot point upon which the socket-lever 19 turns and passing through the side walls of the housing 14. vThe pin 20 is provided upon upper portion ofthe operating pawl and the other end, the inner end of the socket-lever 19. The socket-lever 19' receives one end of an operating lever 22, the same being held therein by any suitable means.

The numeral 23 designates a gun hammershaped, shifting element, provided with an enlarged apertured lower end, for receiving the pin 20. The upper end of the shifting element 23 is provided with an opening for receiving the upper end of a spring 24, which is wound about a trunnion formed upon the standard 8, as shown. The oppo site end of the spring 24 engages a trunnion 26 formed upon the standard 8. Attention is called to the fact that the spring 24 is shown in Figs. 2 and 4. The operating pawl 13 carries upon its upper portion a ment wit whereby, when the socket lever 19. is swung laterally extending pin or trunnion 29, which is engaged bv the shifting element 23 when the finger 2 is moved to bring the head 28 out of engagement with the shifting element. When the shifting element 23 is held in its inoperative position, as shown in- Fig. 2, the pawls 12 and 13 upon being operated, will elevate the lift element 9. When the shifting element 23 is released, so that its spring 24 may swing the same to the right, as shown in Fig. 4, upon the swinging of the operating lever, the pawls 12 and 13 will lower the lift element 9. The-shifting element 23, being released, the spring 24 will swing the same forwardly into engagethe extension or trunnion 29,

. to its uppermost position, the weight of the rack-bar 9 being held by the pawl 12, the pawl 13 will be swung away from the teeth 11, and the shifting element 23 will move to the right until it comes into contact with the trunnion 18. Upon the downward movement of the socket lever 19, the pawl 13' is moved.upwardly into engagement with the tooth below and adjacent the free end of the pawl 12. This upward movement of the pawl 13 raises thestop 29 off of the member 23, leaving the member 23 freeto act upon the stop 18 of the pawl 12; The upper end or head ofthe shifting element 23 now-being in engagement with the extension 18, upon the movement of the socket lever 19' to its lowermost position, the pawl 13 will slightly elevate the rack-bar 9, to take the load of the rack-bar off of the pawl 12. The

pawl 12 will now be' moved by the spring actuated element 23 to release the bar 9, and is held awayfrom the same until the socket lever 19' is moved upwardly. Upon the upward movement of the socket lever 19 the extension 29 slidably engages the element 23, to swing the element inwardly, the pawl 13 now holding the weight of the rackbar 9, whereby thepawl 12 is brought into engagement with the next upper tooth, to in turn take the load of the rack-bar 9 off of the pawl 13, when the socket lever ,19 is again moved to its uppermost position, as

' above described. stiffer than either of the springs 19 and 21,

The open, side of the chamber 15 is normally closed by a removable plate or shield 30, which is provided with an opening 31 formed through the lower portion thereof to receive the reduced end of the trunnion 25, as shown. The material of the plate 30 adja'centthe enlarged heads of the pins'16 and-20 is forced outwardly for forming bulging portions 32, to afford space for these enlarged heads. The lift element or bar 9 is provided near its upper end with an opening 33, for the passage of a bolt 34, 1t be1ng understood that the opposite wall of the standard 8 is provided with an opening 35 l which is in registration Withthe opening 33 when the lift element is in its lower-most position...The other side wall of the standthe plate 30 in place. The pin or trunmon 29 extends beyond the plate 30 for a considerable distance, as shown in Fig. 5, and the same passes through a large opening 38 formed in the plate 30.

The lift element 9 may be instantaneously dropped with or without a load thereon, by manually moving the pin 29 to first bring the operating pawl 13 out of engagement with the ratchet teeth 11, and subsequently bring the upper end of this operating pawl into engagement with the holding pawl 12 to in turn move this holding pawl out of engagement with the ratchet teeth 11, at which time the lift element 9 will drop.

It is to be understood that the form of my invention herewith shown and described is to-be taken as a preferred example of the same and that certain changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit holding pawl pivotally connected with the standard and arranged to engage the teeth,

an operating pawl disposed near and below the holding pawl and adapted to engage the teeth, a swinging operating lever pivotally connected with the operating pawl, springs to move the pawls into engagement with the teeth, an approximately T-shaped shifting element pivotally connected with the standard and arranged near one side of the pawls, extensions carried by the pawls and adapted to engage with the transverse and longitudinal portions of the T-shaped shifting element, and arranged wholly upon the outer side thereof, a leaf spring connected with the standard and having one end thereof passing through an aperture in one end of the transverse portion of the T-shaped shitting element, and a pivoted latch adapted to engage with the longitudinal portion of the T- shaped shifting element adjacent the pivot thereof and to within a recess formed thereon.

2. In a jack of the character described, a standard provided near its upper end with a housing, a lift bar slidahly' engaging the standard and provided with teeth arranged adjacent the housing, an upper holding pawl arranged within the housing to engage with the teeth, a lower operating pawl arranged within the housing to engage teeth, an operating lever pivotally connected with the housing and with. the operating pawl spring means to move the pawls into engagement with the teeth, a shifting lever pivotally connected with the housing and provided near its upper end with an outwardly projecting extension, a spring to move the shifting lever outwardly, means to hold the shifting lever in the inner inactive position, a pin carried by the upper holding pawl and arranged outwardly of and adapted to contact with the lateral extension of the shiftin lever, and a second pin carried loy the lower operating pawl and arranged outwardly of and adapted to contact with the shifting lever and projecting outwardly beyond the housing whereby looth pawls may be simultaneously moved out of engagement with the teeth. to drop the lift har.

' lln testimony whereof I my signature in resence of two witnesses.

Witnesses:

Tnos, HJl /ioonn,

n a w a w. t t CHQPnNinI 

